LSAW black steel pipes We can supply the products of high quality, ... ,flanges ,steel pipesPRODUCTSElbows,reducers,pipe tees,bends,pipe caps ,weldedn neck flanges ,slip on flanges ,blind flanges ,seamless steel pipes ,welded ... , construction industry, domestic installation and otherSURFACE TREATMENTShot blasted, rust-proof black oilRADIUS OF CURVATURE1D-10D ANSI,ASME,API5L,DIN,JIS,BS ...